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/**
 * @id: 15.4.4.20-9-c-i-8;
 * @path: TestCases/chapter15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-c-i-8.js;
 * @description: Array.prototype.filter - element to be retrieved is inherited data property on an Array;
 * @precondition: (fnExists(Array.prototype.filter) && ![, 1].hasOwnProperty(0));
 */

assertTrue((function testcase() {

        function callbackfn(val, idx, obj) {
            return (idx === 1) && (val === 13);
        }

        try {
            Array.prototype[1] = 13;
            var newArr = [, , , ].filter(callbackfn);

            return newArr.length === 1 && newArr[0] === 13;
        } finally {
            delete Array.prototype[1];
        }
    }).call(this));